I solved some previous year questions and I'm able to solve 80 questions out of 100 but I need double time which is 2 hour for solving these 80 questions and as of right now I'm only able to solve 40-45 questions in 60minutes and that's clearly not enough to crack even the pre exam ,so how am I supposed to manage my time ? And I'm not sure if I can crack this after 1 year of vigoros study

You don't have to loose hope. You have enough time for your preparation.
IBPS is all about speed. Work on your time management.
Solve as many as MCQs. Go for timing test.

Fitzz Brown Plsss give me the link or pdf to get previous year question papers plssss ....